55800078002 has 4 divisors (see below), whose sum is σ = 83700117006. Its totient is φ = 27900039000.

The previous prime is 55800077987. The next prime is 55800078017. The reversal of 55800078002 is 20087000855.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55800077987) and next prime (55800078017).

It can be written as a sum of positive squares in only one way, i.e., 32865701521 + 22934376481 = 181289^2 + 151441^2 .

It is a super-2 number, since 2×55800078002² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13950019499 + ... + 13950019502.

Almost surely, 2^55800078002 is an apocalyptic number.

55800078002 is a deficient number, since it is larger than the sum of its proper divisors (27900039004).

55800078002 is a wasteful number, since it uses less digits than its factorization.

55800078002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27900039003.

The product of its (nonzero) digits is 22400, while the sum is 35.

Adding to 55800078002 its reverse (20087000855), we get a palindrome (75887078857).

The spelling of 55800078002 in words is "fifty-five billion, eight hundred million, seventy-eight thousand, two".